mingle: convert usage text to a const char array

This makes the intent of the code slightly clearer, but also pre-emptively
avoids an upcoming -Wwrite-strings warning when converting this code to C++.

Related to #2154.

diff --git a/cmd/mingle/minglemain.c b/cmd/mingle/minglemain.c
index 75ce8600575e818453d583c5c5ef638a98c799ef..4208425cefc2bec62666b0524a4993d94a6b92d3 100644 (file)
--- a/cmd/mingle/minglemain.c
+++ b/cmd/mingle/minglemain.c
@@ -60,7 +60,7 @@ static FILE *openFile(const char *name, const char* cmd)
        return (fp);
 }
 
-static char* use_msg =
+static const char use_msg[] =
 "Usage: mingle <options> <file>\n\
     -a t - max. turning angle [0-180] (40)\n\
     -c i - compatability measure; 0 : distance, 1: full (default)\n\